Cast Aluminum Thermostat Housing for A4 chassis TDIs, (ALH). The stock plastic is a weak point in the cooling system on the ALH. The housing gets brittle with age and often breaks (especially the thermostat retaining tabs) when removing to access the thermostat. 

 
Includes O-ring
Lifetime Warranty
 
Volkswagen
  • Golf TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta Wagon TDI (A4 chassis) w/ ALH Engine (2002-2003)
  • New Beetle TDI (A4 chassis) w/ ALH Engine (1998-2003)

TDI ALH Upgraded Aluminum Thermostat Housing/Coolant Flange

$24.99Price
Thermostat